package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import com.itheima.exception.BussinessException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Override
    public void remove(Long id) {
        //判断当前要删除的id是否关联其他菜品，如果关联，则抛出异常
        LambdaQueryWrapper<Dish> lqw1=new LambdaQueryWrapper<>();
        lqw1.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(lqw1);
        if(count1>0){
            //抛出异常，提醒用户无法删除
            throw new BussinessException("当下分类关联了菜品，无法删除");
        }
        LambdaQueryWrapper<Setmeal> lqw2=new LambdaQueryWrapper<>();
        lqw2.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(lqw2);
        if(count2>0){
            //抛出异常，提醒用户无法删除
            throw new BussinessException("当下分类关联了套餐，无法删除");
        }
        super.removeById(id);

    }
}
